Sealing performance detection device

Abstract

The utility model belongs to the technical field of sealing performance detection, and discloses a sealing performance detection device, which comprises a mounting tool and an airtight instrument. The installation tool comprises a hollow tool shell and further comprises a tool shaft piece, a tool to be detected can be arranged in the tool shell, the tool shaft piece is arranged in the tool to be detected in a penetrating mode, and a closed cavity is defined by the tool shaft piece, the tool to be detected and the tool shell. And the airtight instrument is communicated with the closed cavity and can be used for filling gas into the closed cavity and detecting the airtightness of the closed cavity. According to the sealing performance detection device, the integrity and the sealing performance of the annular to-be-detected tool for sealing can be detected, and the reliability of subsequent use of the to-be-detected tool is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing performance detection, in particular to a sealing performance detection device. Background Art

[0002] At present, annular sealing elements such as PTFE lip seals are generally used directly on products after being manufactured and formed. There is no dedicated detection device to detect the sealing performance between the annular sealing element and the product, and the sealing reliability of the annular sealing element in subsequent use cannot be guaranteed.

[0003] Therefore, a sealing performance detection device is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a sealing performance testing device, which can test the integrity and sealing performance of an annular tooling to be tested for sealing, thereby improving the reliability of subsequent use of the tooling to be tested.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Sealing performance testing device, including:

[0007] An installation tool, wherein the installation tool comprises a tool shell with a hollow interior, and also comprises a tool shaft, the tool to be detected can be arranged in the tool shell, the tool shaft is passed through the tool to be detected, and the tool shaft, the tool to be detected and the tool shell are surrounded to form a closed cavity;

[0008] An airtight instrument is connected to the closed cavity, can fill gas into the closed cavity, and detect the airtightness of the closed cavity.

[0009] As a preferred solution of the sealing performance detection device provided by the utility model, the tooling shell includes an upper shell and a lower shell, the upper shell and the lower shell are snap-fitted and docked with each other, the tooling to be detected can be installed on the lower shell and clamped between the upper shell and the lower shell, and the upper shell, the tooling to be detected and a part of the tooling shaft are surrounded to form the closed cavity.

[0010] As a preferred solution of the sealing performance detection device provided by the utility model, the upper shell is detachably connected to the lower shell.

[0011] As a preferred solution of the sealing performance detection device provided by the utility model, an upper annular boss is extended at the opening of the upper shell toward the central axis of the upper shell; a lower annular boss is extended at the end opening of the lower shell away from the upper shell toward the central axis of the lower shell; the tooling to be detected extends and protrudes from the end opening of the lower shell close to the upper shell, and is clamped between the upper annular boss and the lower annular boss.

[0012] As a preferred solution of the sealing performance detection device provided by the utility model, the inner diameter of the lower annular boss is larger than the outer diameter of the tooling shaft, and the tooling to be detected extends out of the lower annular boss and is clamped between the peripheral side of the tooling shaft and the inner wall of the lower shell.

[0013] As a preferred solution of the sealing performance detection device provided by the utility model, the tooling to be detected includes an annular molded product and an annular sealing ring, the annular sealing ring is installed in the annular molded product, the annular molded product is clamped between the upper annular boss and the lower annular boss, and the annular sealing ring is clamped between the annular molded product and the peripheral side of the tooling shaft.

[0014] As a preferred solution of the sealing performance detection device provided by the utility model, the tooling shaft is provided with an air inlet channel, and the openings at both ends of the air inlet channel are respectively connected between the closed cavity and the airtight instrument.

[0015] As a preferred solution of the sealing performance detection device provided by the utility model, the air inlet channel is opened along the axial direction of the tooling shaft, and the central axis of the air inlet channel coincides with the central axis of the tooling shaft.

[0016] As a preferred solution of the sealing performance detection device provided by the utility model, the sealing performance detection device further includes an air inlet pipe, and the air inlet pipe is connected to the airtight instrument and the closed cavity.

[0017] As a preferred solution of the sealing performance detection device provided by the utility model, arc transition parts are respectively arranged at both ends of the tooling shaft along the circumferential direction.

[0018] Beneficial effects of the utility model:

[0019] The sealing performance detection device provided by the utility model includes an installation tool and an airtight instrument. The installation tool includes an internally hollow tool shell, and also includes a tool shaft. The tool to be detected can be arranged in the tool shell, and the tool shaft is inserted into the tool to be detected. The tool shaft, the tool to be detected and the tool shell are surrounded to form a closed cavity. In other words, the inner hole wall of the tool to be detected can be tightly abutted by the tool shaft, and the outer peripheral wall of the tool to be detected can be tightly abutted by the tool shell to ensure the sealing between the tool to be detected and the installation tool. The airtight instrument is connected to the closed cavity, and gas can be filled into the closed cavity to detect the airtightness of the closed cavity. In other words, the airtight instrument can detect the sealing performance by inflating and pressurizing the closed cavity, and then detect the sealing performance of the tool to be detected itself, thereby improving the reliability of the subsequent use of the tool to be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axial cross-sectional view of the sealing performance detection device provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A magnified view of the structure marked as A.

[0022] In the figure:

[0023] 10. Tooling to be tested; 11. Ring-shaped molded product; 12. Ring-shaped sealing ring;

[0024] 100, tooling housing; 110, closed cavity; 120, upper housing; 121, upper annular boss; 130, lower housing; 131, lower annular boss;

[0025] 200, tooling shaft; 210, air intake passage; 220, arc transition portion;

[0026] 300, airtight instruments;

[0027] 400. Intake pipe. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] Figure 1 An axial cross-sectional view of the sealing performance detection device provided by an embodiment of the utility model is shown, Figure 2 Show Figure 1 A partial enlarged view of the structure marked as A. Figure 1 and Figure 2 , this embodiment provides a sealing performance detection device.

[0033] The sealing performance detection device includes an installation tool and an airtight instrument 300. The installation tool includes a tool shell 100 with a hollow interior, and also includes a tool shaft 200. The tool 10 to be detected is annular and can be arranged in the tool shell 100, and the tool shaft 200 is passed through the central opening of the tool 10 to be detected. The tool shaft 200, the tool 10 to be detected and the tool shell 100 are arranged to form a closed cavity 110. The airtight instrument 300 is connected to the closed cavity 110, and gas can be filled into the closed cavity 110, and the sealing performance of the closed cavity 110 is detected by means of inflation and pressurization, that is, the sealing performance of the tool 10 to be detected itself is detected, so as to improve the reliability of the subsequent use of the tool 10 to be detected.

[0034] Specifically, the tool housing 100 includes an upper housing 120 and a lower housing 130. The upper housing 120 and the lower housing 130 are buckled and docked with each other, the tool to be detected 10 can be installed in the lower housing 130 and clamped between the upper housing 120 and the lower housing 130, and the upper housing 120, the tool to be detected 10 and the tool shaft 200 are inserted into a part of the tool housing 100 to surround and form the closed cavity 110.

[0035] More specifically, the upper shell 120 and the lower shell 130 are detachably connected by a plurality of connecting female ends (not shown) arranged on the circumferential side of the upper shell 120 and a plurality of connecting male ends (not shown) arranged on the circumferential side of the lower shell 130. The connecting female ends and the connecting male ends correspond to each other one by one, and are evenly spaced along the circumferential direction on the circumferential side of the upper shell 120 and the circumferential side of the lower shell 130, respectively. The matching mode of the connecting male ends and the connecting female ends can be selected from the connection modes such as snap-fit ​​in the prior art, so as to realize the reliable connection between the upper shell 120 and the lower shell 130, and the specific types are not described in detail in this embodiment.

[0036] Optionally, the tooling to be inspected 10 includes an annular molded product 11 and an annular sealing ring 12, and the annular sealing ring 12 is installed in the annular molded product 11. In this embodiment, the tooling to be inspected 10 can be specifically a PTFE lip oil seal.

[0037] Continue to refer to Figure 1 and Figure 2 The upper shell 120 has an upper annular boss 121 extending from the opening thereof toward the central axis of the upper shell 120. The lower shell 130 has an end opening away from the upper shell 120 and a lower annular boss 131 extending toward the central axis of the lower shell 130. The annular sealing ring 12 extends out of the end opening of the lower shell 130 close to the upper shell 120, and the tooling 10 to be inspected can be sandwiched between the upper annular boss 121 and the lower annular boss 131 as a whole.

[0038] Specifically, the inner diameter of the lower annular boss 131 is larger than the outer diameter of the tooling shaft 200, and the annular seal ring 12 extends out of the lower annular boss 131 toward the central axis of the lower shell 130, and is sandwiched between the peripheral side of the tooling shaft 200 and the inner side wall of the lower shell 130. The tooling shaft 200 and the inner wall of the central opening of the annular seal ring 12 are interference fit. The annular molded product 11 is tightly sandwiched between the upper annular boss 121 and the lower annular boss 131, and the annular seal ring 12 is tightly sandwiched between the annular molded product 11 and the peripheral side of the tooling shaft 200.

[0039] More specifically, the tool shaft 200 is a cylindrical structure, and arc transition portions 220 are respectively arranged at both ends along the circumferential direction. The arc transition portion 220 protrudes in a direction away from the axis of the tool shaft 200, and forms an arc transition between the end and the circumferential side of the tool shaft 200, so as to prevent the problem that the circumferential edge of the end of the tool shaft 200 is too sharp when the tool shaft 200 is inserted into the central opening of the annular sealing ring 12, thereby damaging the annular sealing ring 12.

[0040] More specifically, the tool shaft 200 is provided with an air inlet channel 210, and the openings at both ends of the air inlet channel 210 are respectively connected to the closed cavity 110 and the airtight instrument 300. The sealing performance detection device also includes an air inlet pipe 400. The air inlet pipe 400 is connected between the airtight instrument 300 and the closed cavity 110. The air inlet pipe 400 is a flexible pipe structure. Through the above arrangement, the flexibility of adjusting the relative position of the airtight instrument 300 and the installation tool can be improved.

[0041] More specifically, the air inlet channel 210 is opened along the axial direction of the tool shaft 200, and the central axis of the air inlet channel 210 coincides with the central axis of the tool shaft 200. Through the above arrangement, the gas can enter the closed cavity 110 along the central axis of the installation tool, so as to ensure the uniformity of gas injection and diffusion into the closed cavity 110, and improve the efficiency of gas filling the closed cavity 110.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A sealing performance testing device, characterized in that: include: An installation tool, the installation tool comprising a tool housing (100) with a hollow interior, and also comprising a tool shaft (200), the tool to be detected (10) can be arranged in the tool housing (100), the tool shaft (200) is inserted into the tool to be detected (10), and the tool shaft (200), the tool to be detected (10) and the tool housing (100) are arranged to form a closed cavity (110); An airtight instrument (300), the airtight instrument (300) is connected to the sealed cavity (110), can fill gas into the sealed cavity (110), and detect the airtightness of the sealed cavity (110).

2. The sealing performance detection device according to claim 1, characterized in that: The tooling shell (100) comprises an upper shell (120) and a lower shell (130), wherein the upper shell (120) and the lower shell (130) are engaged with each other, and the tooling to be detected (10) can be installed on the lower shell (130) and clamped between the upper shell (120) and the lower shell (130), and the upper shell (120), the tooling to be detected (10) and a part of the tooling shaft (200) are arranged to form the closed cavity (110).

3. The sealing performance detection device according to claim 2, characterized in that: The upper shell (120) is detachably connected to the lower shell (130).

4. The sealing performance detection device according to claim 2, characterized in that: An upper annular boss (121) is provided at the opening of the upper shell (120) and extends in the direction of the central axis of the upper shell (120); a lower annular boss (131) is provided at the end opening of the lower shell (130) away from the upper shell (120) and extends in the direction of the central axis of the lower shell (130); the tooling (10) to be detected extends and protrudes from the end opening of the lower shell (130) close to the upper shell (120), and is clamped between the upper annular boss (121) and the lower annular boss (131).

5. The sealing performance detection device according to claim 4, characterized in that: The inner diameter of the lower annular boss (131) is greater than the outer diameter of the tooling shaft (200), and the tooling to be detected (10) extends out of the lower annular boss (131) and is sandwiched between the peripheral side of the tooling shaft (200) and the inner side wall of the lower shell (130).

6. The sealing performance detection device according to claim 4, characterized in that: The tooling (10) to be inspected comprises an annular formed product (11) and an annular sealing ring (12); the annular sealing ring (12) is installed in the annular formed product (11); the annular formed product (11) is clamped between the upper annular boss (121) and the lower annular boss (131); the annular sealing ring (12) is clamped between the annular formed product (11) and the peripheral side of the tooling shaft (200).

7. The sealing performance detection device according to claim 1, characterized in that: The tooling shaft (200) is provided with an air intake channel (210), and openings at both ends of the air intake channel (210) are respectively connected between the sealed cavity (110) and the airtight instrument (300).

8. The sealing performance detection device according to claim 7, characterized in that: The air inlet channel (210) is opened along the axial direction of the tooling shaft (200), and the central axis of the air inlet channel (210) coincides with the central axis of the tooling shaft (200).

9. The sealing performance detection device according to claim 1, characterized in that: The sealing performance detection device further comprises an air inlet pipe (400), wherein the air inlet pipe (400) is connected between the airtight instrument (300) and the sealed cavity (110).

10. The sealing performance detection device according to any one of claims 1 to 9, characterized in that: Arc transition portions (220) are respectively arranged at both ends of the tooling shaft member (200) along the circumferential direction.

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